Find the slope of the line

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?